<!--
	此示例下载自 https://echarts.apache.org/examples/zh/editor.html?c=pie-half-donut
-->
<!DOCTYPE html>
<html lang="en" style="height: 100%">
<head>
  <meta charset="utf-8">
</head>
<body style="height: 100%; margin: 0">
  <div id="ec-ec-container-2-2" style="height: 100%"></div>

  
  <script type="text/javascript" src="https://registry.npmmirror.com/echarts/5.4.3/files/dist/echarts.min.js"></script>
  <!-- Uncomment this line if you want to dataTool extension
  <script type="text/javascript" src="https://registry.npmmirror.com/echarts/5.4.3/files/dist/extension/dataTool.min.js"></script>
  -->
  <!-- Uncomment this line if you want to use gl extension
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  -->
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  <!-- Uncomment this line if you want to use map
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  -->
  <!-- Uncomment these two lines if you want to use bmap extension
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  -->

  <script type="text/javascript">
    var dom = document.getElementById('ec-container-2');
    var myChart = echarts.init(dom, null, {
      renderer: 'canvas',
      useDirtyRect: false
    });
    var app = {};
    
    var option;

    option = {
  tooltip: {
    trigger: 'item'
  },
  legend: {
    top: '5%',
    left: 'center',
    // doesn't perfectly work with our tricks, disable it
    selectedMode: false
  },
  series: [
    {
      name: 'Access From',
      type: 'pie',
      radius: ['40%', '70%'],
      center: ['50%', '70%'],
      // adjust the start angle
      startAngle: 180,
      label: {
        show: true,
        formatter(param) {
          // correct the percentage
          return param.name + ' (' + param.percent * 2 + '%)';
        }
      },
      data: [
        { value: 1048, name: 'Search Engine' },
        { value: 735, name: 'Direct' },
        { value: 580, name: 'Email' },
        { value: 484, name: 'Union Ads' },
        { value: 300, name: 'Video Ads' },
        {
          // make an record to fill the bottom 50%
          value: 1048 + 735 + 580 + 484 + 300,
          itemStyle: {
            // stop the chart from rendering this piece
            color: 'none',
            decal: {
              symbol: 'none'
            }
          },
          label: {
            show: false
          }
        }
      ]
    }
  ]
};

    if (option && typeof option === 'object') {
      myChart.setOption(option);
    }

    window.addEventListener('resize', myChart.resize);
  </script>
</body>
</html>